With the Entomologist perk, you do an additional +50% damage every time you attack a mutated insect, like the radroach, giant ant, or radscorpion.Fallout 3 in-game description

Entomologist is a Fallout 3 and Fallout: New Vegas perk.

Fallout 3

With this perk, Lone Wanderer inflicts 50% more Damage when attacking every radroach, giant ant, bloatfly or radscorpion.


  • This perk allows for expanded dialogue options when speaking with other entomologists, especially in the quest Those!
  • Despite it appearing early in the player character's perk choices, the player character will find that giant radscorpions, encountered very often later in the game, are difficult to kill in one round of V.A.T.S. without the perk.
  • With the add-on Broken Steel, this perk also yields a significant damage increase against the new albino radscorpion.

Fallout: New Vegas

With this perk, the Courier inflicts 50% more Damage when attacking any cazador, radscorpion, radroach, giant ant, mantis or bloatfly.


This perk affects radscorpions, despite the fact that scorpions are arachnids, rather than insects.

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